Bucket cleaner for excavating machines



July 15, 1930. A. cARLEsIMO 3 BUCKET CLEANER FOR EXCAVATING' IACHINES Filed Sept. 17, 1928 Patented July 15, 1930 ANGELO GARLESIMO, or nE'rRorn-mIcHIeAN B oxEr CLEANER Iron nxcnvnrme MACHINES,

Application filed September 17,1928.

are to provide breakable element adapted to; give way in the 1 event a pressure in excess of a predetermined maximum is exerted in order to prevent 1111111y to the workmgparts of the machine; and to improved features of construction and arrangement hereinafter described. Y

The invention is shown by way of illustration' in the accompanying drawings, in

V which:

Fig. 1 is a sectional elevation on the line 11 of Fig. 2, showing theouter end of a digging beam with a bucket cleaner installed thereon and in raisedposition; and

Fig. 2 is a top plan view of the outer or cleaning end of the bucket cleaner. f u

The illustrated embodiment of the invention comprises a digging beam 1 of an exonly the outer end portion thereof beingshown. Fixed to cavating or trenching machine,

the outer end of the beam 1 is a bracket 2 .viding a bearing sprocketwheelshaft 3, a sprocket wheel 4 being mountedon the shaft 3. Trainedabout the sprocket wheel 4 is a chain 5, to-which series-of digging and conveying buckets 6 are secured, onlyone of such buckets being shown. It is to be understood that a second sprocket wheel is mounted in spaced relation 0 on the shaft 3, and a chain istrained over .this wheelto provide a support for the opposite sides ofthe buckets. It will be readily prounderstood that-the sprocket wheel 41 is r0- 3 tated in counter clockwise. direction, and as the buckets pass about, the sprocket wheel,

fltheir contentsaredischarged. i a I In order to clean'for scrapethe material,

.su'chas dirt, stones,'etc., from the buckets" as theypass aroundthe sprocket wheel, a 0 -c1eanerunitG is mounted adjacent the outer ition.

for a horizontallydisposed Serial n6. 306,329.

unit C is pivotally connected at 7 to the bracket 2,and consists of a relatively long arm- 8 and a short arm 9, which are pivotally connected at 10. It is apparent that the cleaner unit is so mounted that the free or outer end drops down by tion shown by the dotted lines, a stop 11 on the bracket 2 limiting the downward movement of the cleaner. When the cleaner is in position'resting upon the stop 11, it is properly'positioned for cleaning, and the outer end of the cleaner passes through the buckets as they travel around the sprocket wheel 4. 15 provide a bucket cleaner havingithe new and In the event that=thefouter end of 1 the cleaner encounters a resistance sufficient to overcome its inertia, it may bemoved upwardly about its pivot 7 -into engagement with a stop 12 on the bracket 2 above the stop 11, and as soon as the pressure "is relieved, the cleaner drops back by gravity to [1 UNITED "STATES PATENT oFFIcE-Y end'of the beam, The inner end of the cleaner gravity to the posiits normal cleaning position. It is, therefore,

manifest that the cleaner C has limited move.-

.ment betweenlthe stops 11 and 12, and may be swung in a vertical direction about its horizontal pivot 7 away from cleaning posi- As shown in F ig; 2, the short arm 9 of the cleaner G is somewhat wider than the arm 8, and arelatively long cleaning blade 13 is det'achably connected to the arm 9 by a series of bolts and nuts 14. The blade 13 may be of suflicient length to. cover substantially the bottom of the buckets? in order effectively to remove all material therefrom.

The arm 9 is provided witha rearward central extension 15, and the arm 8. is provided with a 16, between which the'extension 15 is dis- 1 posed. The brackets 16 and extension 15 are formed with registering openings to receive a shear pin 17. I

pair of outwardly extending brackets j Normally upon'engagementof the matei V I other sticky substance adhere to the cleaning blade, 13, the shock of impact occasioned by the cleaner unit G striking the stop 11 1n its downward movement will tend to ar such material loose to present a relatively clean blade for the next succeeding bucket.

Should a shock beimparted. to the cleaner C which not only raises it into engagement with the stop 12, but this is insufficient to relieve the pressure on the outer end portion of the cleaner, the arm 9 may be swung about its pivot 10 in a clockwise direction, the pin 17 being first sheared to permit this movement. This will take place should the movement of the cleaner between the stops 11' and 12be insuflicient .to relieve the pressure against the end portion of the cleaner, the strength of the shear pin 17 being so chosen that the same will be sheared intheevent that the pressure or shock imparted to the cleaner is in excess of a predetermined maxi mum.

It is apparentthat with this construction, the bucket cleaner is normally held by gravity in cleaning position, and is allowed a limited'movement between the stops 11 and 12 to relieve the pressure thereagainst sufiicient to overcome its inertia. In order to prevent injury to the working parts of the machine in case anunusuallygreat shock or-pressure is imparted to theend portion of the cleaner, the shear pin 17 is severed, thereby permitting thearms 9.160 swing in a counter clockwise direction. Thereafter to render the cleaner effective, it .is necessary simply to replace the pin 17 Numerous changes n details of construction and arrangement may be effected without departing from-the spirit of the invention, especially as defined in the appended claims.

lVhat I claim as new and by Letters Patent is:

" 1. In a trenching machine having a series of digging and conveying buckets and a wheel about which said bucket-sf travel, a bucket desire to secure cleaner having an end pivotally mounted and.

theopposite end provided'witl acleauing blade, the wei ht of such outer end being suflicient normally to'hold said cleaner in cleaning position said cleaner comprising a pair of pivotally connected arms, one aim being pivoted intermediateits ends to the other arm, and a shear pin connecting the inner "end ofjthefor-mer arm to the latter arm, thereby to permit relative movementof said arms, when a pressure is exerted-there against in excessof a predetermined maximum. l: 2. In a trenching machinehaving a digging team, a spr ke W e l at is o te en ther of, a series ,ofdigging and conveying buckets adapted to travel about said sprocket wheel, a bracket, a cleaner pivoted" atone end to said bracket, the opposite end of said cleaner being held downwardly in cleaning position by gravity, a stop onsaid bracket limiting the downward movement of said cleaner, another stop on said bracket limiting the upward movement of said cleaner, said cleaner comprising a long and. short arm pivoted together, said short arm oted intermediate its ends to the long arm, and a shear pin connecting the inner endof said short arm to said long arm thereby to permit relative movement of said arms when a shock in excess of a predetermined maximum is encountered,

3. In an excavator bucket cleaner, an arm, means to movably mount-the arm at one end thereof for bodily swinging movement, and for causing the arm to respond to the action of gravity, a stop above the .arm and a stop spaced from the the arm for limiting movements thereof, and a cleaner carried by the opposite end of the arm, and being held inoperative position by the force of gravity.

In an excavator bucket cleaner, an arm, means to movably mount the arm at one'end thereofi'or swinging movement, and for causing the arm to respond to the action of gravity, a step above the arm and a stop below the arm torlimiting movements thereof, a cleaner pivoted to the outer end of the arm, and means for normally holding the cleaner against pivotal movement relative to the arm and for enabling same to'have pivotal movement when the cleaner is subjected to an inj urious force.

5. In an excavator bucket cleaner, a cleaner carrier, means to movably mount the carrier for causing same to bodily respond tothe action of gravity, spaced stop meansspaced being pivfirst stop and'located below llll fromjeach other and disposed on opposite sides of the carrier to engage same and restrict gr-avitative and upward movement of the carrier, and; a cleaner on the carrier, and held in operative position by the force of ty 7 v 6; In an' excavator bucket cleaner, a cleaner carrier, means tomovably mount the carrier for causing same to respond to the action of gravity, spaced stop means on opposite sides of the carrier to engage same and restrict gravitative and upward movement or" the carrier, a cleaner pivoted to the carrier, and releasable means for normally holding the cleaner against pivotal movement relative to the carrier a -id ior-enabling samexto have pivotal movement when the cleaner is subjected to an injurious force.-

" 7. In an 'excavator bucket cleaner, an arm,

means to' mova-bjly mount the arm atone end j hereot or odily swi ging mo ement, and

to limit downward'movement of the arm, and, a cleaner carried by the opposite end of the arm, and held in force of grav operative position by the ity.

In testimony whereof 'I have hereunto signed my na me to this specificati0n.-

' ANGELO CAYRLESIMO. 

